Phase separation in trapped dipolar Fermi gases
Phase separation in trapped dipolar Fermi gases
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DOI：
10.1103/physreva.101.033613
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发表时间：
2020-03
影响因子：
2.9
通讯作者：
T. Miyakawa;Shin-ichi Nakamura;H. Yabu
中科院分区：
文献类型：
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作者：
T. Miyakawa;Shin-ichi Nakamura;H. Yabu
本文研究了零温下球对称简谐势阱中双组分偶极费米气体的基态。我们得到的基态的磁矩大小相等，但相反的值的基础上的Fermi-vonWeizsäcker近似。研究发现，在自旋对称相和相分离相之间的相变过程中，出现了两种打破球对称性的相分离态。一个是轴对称的相分离态，另一个是一维的交替自旋分层态。我们还研究了极化Dy和Er原子的费米-费米混合物，并表明在当前的实验中可以观察到相分离的结构转变，通过改变粒子的相对数量。
We study the ground state of a two-component dipolar Fermi gas in a spherically symmetric harmonic trap at zero temperature. We obtain the ground state of the system with equal but opposite values of the magnetic moment on the basis of the Thomas–Fermi–von Weizsäcker approximation. It is found that two types of phase-separated states which break the spherical symmetry emerge across the phase transition between a spin-symmetric phase and a phase-separation phase. One is an axially symmetric phase-separated state and the other is a one-dimensional alternating-spin layered state. We also study a Fermi-Fermi mixture of polarized Dy and Er atoms and show that a structural transition of phase separation can be observed in current experiments by varying the relative number of particles.